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clintonhebb avatar image
clintonhebb asked

Multiplus 12/3000/120/16 shuts off after drawing AC inverted power for few min

Hi,
i have a Mulitplus 12/3000/120/16 in my van & when i turn on a space heater at 800w it runs it for a few minutes then shuts multiplus down. I don’t know if it turns back on as i have just rebooted it each time.

any help would be appreciated.

I have a 60aH battery at the moment but intend on upgrade it soonish.

I’d like to be able to boil a kettle during my work day. But is shuts down immediately when i swithch kettle on.

thanks

Clinton

Multiplus-IIMPPT Controllers
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2 Answers
rslifkin avatar image
rslifkin answered ·

What's the battery voltage doing when it shuts down? With that amount of load, you're pulling an awful lot of power for such a small battery. I wouldn't be surprised if it's pulling the voltage down enough to hit the low voltage cutoff.

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clintonhebb avatar image clintonhebb commented ·

I’ll have to do a wee test to see.

I also might have found the answer in another q&A,

i have 35mm cable from battery protect to Lyncs bus Bar & 50mm from batteries to battery protect. I knew this could have been a problem ans was planning to change them out but wanted to get it up & running & only had 35mm.

thanks

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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

There should be a red LED on the Multi.
I also think it is a low voltage cut-off.

What kind of battery do you have? lead or lithium?

A MultiPlus must not be connected to a BatteryProtect!
(Reverse current flow during charging)

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clintonhebb avatar image clintonhebb commented ·

Ok, I’ll check into it.

Multiplus its not connected directly. Multiplus is connected to lyncs distributor

when you say “low voltage cut off” are you suggestion that i can change a setting & it will fix the problem or i need bigger battery capacity?

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Matthias Lange - DE avatar image Matthias Lange - DE ♦ clintonhebb commented ·

As long as the Multi can't push energy through the BP in the wrong way (from OUT to IN) everything is fine. But to be sure can you make a wiring diagram or some pictures?

Yes there are many setting you can/should change.
You can do this with the DIP-switches inside but in my opinion this is to complicated
It is described in the manual but I never done it this way.
I would recommend to use VE.config or VictronConnect but you need a MK3 Interface for that.

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